EP1009182B1 - Kanalzuweisungssystem - Google Patents

Kanalzuweisungssystem Download PDF

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Publication number
EP1009182B1
EP1009182B1 EP99124396A EP99124396A EP1009182B1 EP 1009182 B1 EP1009182 B1 EP 1009182B1 EP 99124396 A EP99124396 A EP 99124396A EP 99124396 A EP99124396 A EP 99124396A EP 1009182 B1 EP1009182 B1 EP 1009182B1
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EP
European Patent Office
Prior art keywords
station
slave
serving
base station
information
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP99124396A
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English (en)
French (fr)
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EP1009182A2 (de
EP1009182A3 (de
Inventor
Noriyoshi Sonetaka
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
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NEC Corp
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Filing date
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Publication of EP1009182A3 publication Critical patent/EP1009182A3/de
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Publication of EP1009182B1 publication Critical patent/EP1009182B1/de
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/02—Resource partitioning among network components, e.g. reuse partitioning
    • H04W16/10—Dynamic resource partitioning
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/10—Small scale networks; Flat hierarchical networks
    • H04W84/14—WLL [Wireless Local Loop]; RLL [Radio Local Loop]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/18—Self-organising networks, e.g. ad-hoc networks or sensor networks
    • H04W84/20—Master-slave selection or change arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/08—Access point devices
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/12—Access point controller devices

Definitions

  • the present invention relates to assign channel distributing system and method for assigning radio channels optimally to a radio system in a system (wireless local loop) which uses a radio system comprising cellular telephones, etc. and contains general subscribers (telephones).
  • An optimum arrangement of radio channels is an item indispensable to effectively use definite frequency resources.
  • each base station is provided with a priority function on channel use and the priority function is varied according to the magnitude of the interference level of each channel.
  • this system has such a disadvantage that the interference relationship between the interference level measured by an individual base station and the interference level measured by other base stations is unclear and thus this system does not support timely traffic variation.
  • US-A-5 822 361 discloses an assign channel distributing system comprising subscriber terminals and plural base stations containing a base station serving as the master station.
  • EP-A-0 621 707 discloses an assign channel distributing system comprising a Wireless Network Manager (WNM) or Wireless Network Controller (WNC), plural base stations and subscriber terminals.
  • WNM Wireless Network Manager
  • WNC Wireless Network Controller
  • An object of the present invention is to provide an assign channel distributing system and method which can perform an optimum radio channel assignment to a radio system.
  • an assign channel distributing system Comprising subscriber terminals (4) and plural base stations (3) for communicating with said subscriber terminals (4), charcterized in that said assign channel distributing system comprises a base station control-station (2) for sending to said plural base stations (3) information indicating whether each of said base stations (3) should serve as a master station or slave station (i.e., an assignment of a master station or a slave station to each of the base stations, and it is hereinafter referred to as "master/slave assignment"), and that said plural base stations (3) comprise one or more base stations serving as the slave stations and a base station serving as the master station for sending a channel ⁇ CH> information request to said one or more base stations, receiving as CH information, information which is held in said one or more base stations and then sending to said one or more base stations CH assignment information for determining an arrangement of radio channels which do not affect the surroundings.
  • said assign channel distributing system comprises a base station control-station (2) for sending to said plural base stations (3) information indicating whether each of said base stations (3) should serve as
  • an assign channel distributing method Comprising a step of performing communications between a subscriber terminal (4) and plural base stations (3), characterized by comprising the steps of: a first step of sending to said plural base stations (3) information indicating whether each base station serves as a master station or a slave station, and a second step of sending CH information request from the base station serving as the master station to one or more base stations serving as the slave stations, sending infromation held in said slave stations as CH information to said master station, and then sending from said master station to said slave stations CH assignment information for determining a radio channel assignment which does not affect the surroundings.
  • the assign channel distributing system and method of the present invention on the basis of the information indicating the master/slave assignment which is sent from a base station control-station to the respective base stations, the information on the channel interference level, the desired channel number, and the like is exchanged between the master station and each slave station, whereby the master station performs the radio channel assignment on the slave stations on the basis of the information on the channel interference level, the desired channel number, and the like.
  • Fig. 1 is a block diagram showing a first embodiment of an assign channel distributing system according to the present invention
  • Figs. 2 and 3 are sequence diagrams showing the operation of the assign channel distributing system shown in Fig. 1.
  • the assign channel distributing system shown in Fig. 1 has exchange 1 and base station control-station 2 for exchanging a radio access system.
  • the exchange 1 is connected to a PBX (Private Branch Exchange) 101.
  • the exchange 1 and the PBX 101 are connected to telephones 5.
  • the base station control-station 2 is connected to base stations (A,B) 3 through antenna 201 or cable 202 containing optical fibers.
  • the base station (A) 3 has antennas 301, 302 and circuits 310, 311.
  • the circuit 310 serves to receive/send radio signals from/to the base station control-station 2.
  • the circuit 311 converts both of radio signals from the base station control-station 2 and radio signals from subscriber terminal 4.
  • the base station (B) 3 has antenna 302 and circuits 312, 313.
  • the circuit 312 has the same function as the circuit 311, and the circuit 313 serves to convert electrical signals sent through the cable 202 to radio signals and output the radio signals to subscriber terminal 4.
  • Each subscriber terminal 4 has antenna 401 and circuits 410 to 412.
  • the antenna 401 serves to receive/send radio signals from/to each base station 3, and the circuit 410 converts electrical signals to radio signals.
  • the circuits 411, 412 converts the radio signals from the antenna 401 to telephone interface signals. These circuits 411, 412 are connected to telephones 5.
  • connection between the exchange 1 and the base station control-station 2 may be performed under a radio (wireless) condition or a wire condition.
  • the exchange 1 may be a private branch exchange or the like.
  • the connection between the base station control-station 2 and the base stations (B) 3 may be performed through any medium which can perform communication transmission such as radio, optical fibers, metal wires or the like.
  • a point-point system or a point-multipoint system may be use as an access system between the base station control-station 2 and the base stations 3. Further, if a point-multipoint system (a point-point system is possible) is based as a multiplexing system for the connection between the base station 3 and the subscriber terminal 4, TDMA (Time Division Multiple access) system, FDMA (Frequency Division Multiple access) system, CDMA (Code Division Multiple access) system, or the like may be used.
  • TDMA Time Division Multiple access
  • FDMA Frequency Division Multiple access
  • CDMA Code Division Multiple access
  • radio access system between the base station 3 and the subscriber terminal 4 may be used GSM (Global System for Mobile Communication), AMPS (Advanced Mobile Phone Service), PDC (Personal Digital Cellular Telecommunication), PCS (Personal Communications System), DECT (Digital European Cordless Telecommunication), PHS (Personal Handy Phone System), or the like.
  • GSM Global System for Mobile Communication
  • AMPS Advanced Mobile Phone Service
  • PDC Personal Digital Cellular Telecommunication
  • PCS Personal Communications System
  • DECT Digital European Cordless Telecommunication
  • PHS Personal Handy Phone System
  • the base station control-station 2 sends to the base stations (A,B) 3 information indicating whether each base station plays a role as a master station or a slave station, and information indicating an assignment of inherent numbers to the respective base stations 3.
  • the base station (A) 3 serves as a master station and the base station (B) 3 serves as a slave station.
  • the base station (A) 3 serving as the master station sends a "CH information request" to the base station (B) 3 serving as the slave station.
  • the CH information request is a signal for requesting information on channel interference level, a desired channel number, etc. which is held in the base station (B) 3 serving as the slave station.
  • the base station (B) 3 serving as the slave station sends this information to the base station (A) 3 serving as the master station as "CH information".
  • the master station (A) 3 determines the radio channel arrangement (assignment) which does not affect the surroundings, and sends it as "CH assignment information" to the slave stations (B) 3.
  • a call reception (receive) to the subscriber terminal 4 is performed on the basis of the arrival of a call reception signal from the exchange 1 through the base station control-station 2 at the base station (B) 3 serving as the slave station.
  • the slave station (B) 3 assigns the radio frequency to be used to the subscriber terminal 4 on the basis of the "CH assignment information" obtained through the above sequence.
  • the information on the channel interference levels, the desired channel numbers, etc. is exchanged between the master station (A) 3 and each slave station (B) 3, and then the master station (A) 3 assigns the radio channels on the basis of the information thus exchanged to the respective slave stations (B) 3, thereby performing the optimum assignment of the radio channels in the radio system.
  • FIGs. 4 and 5 are sequence diagrams showing a second embodiment of the assign channel distributing system according to the present invention.
  • a base station (A) 3 is assumed as a master station, and base stations (B,C) 3 are assumed as slave stations. That is, the base station (A) 3 sends "CH information request" to each of the base stations (B,C) 3 serving as the slave stations, and then receives "CH information" from each slave station. Thereafter, the master station (A) 3 collects information on interference level, a desired channel number, etc. from each slave station (B,C) 3, selects radio channels having no effect on the surroundings to the slave station (B,C) 3 on the basis of the information thus collected, and then sends "CH assignment information" to each of the slave station (B,C) 3, whereby an optimum channel assignment can be performed.
  • the base station (B) serving as the slave station does not know which one of the base stations (A,C) 3 is the master station, the base station (B) can specify the master station on the basis of an inherent number assigned to the base station serving as the master station.
  • the inherent numbers assigned to the base stations may be settled so that each base station is obedient to a base station having an inherent number smaller than that of the base station concerned.
  • the above operation may be carried for the "CH assign" operation at any time, for example, at the start time, during an actual use period.
  • Figs. 6 and 7 are sequence diagrams showing a third embodiment of the assign channel distributing system according to the present invention.
  • the master station (A) 3 can communicate with the incommunicable slave station by getting relating information through any slave station other than the incommunicable slave station.
  • the base stations 3 are assumed to be provided with inherent numbers of No. 1 to No.3, respectively.
  • the master station (A) 3 first sends "CH information request” to the slave station (B) 3, and then the slave station (B) 3 sends "CH information request” to the slave station (C) 3.
  • the "CH information” output from the slave station (C) 3 is sent via the slave station B(3) to the master station (A) 3.
  • the "CH assignment information” is also sent via the slave station (B) 3 to the slave station (C) 3.
  • the above sequence may be performed on the basis of an instruction from the base station control-station 2. Even when the master station (A) 3 cannot communicate with any one of the slave stations (B,C) 3 in the course of the operation, the master station can communicate with the incommunicable slave station through the above relay communication.
  • FIGs. 8 and 9 are sequence diagrams showing a fourth embodiment of the assign channel distributing system according to the present invention.
  • the fourth embodiment contains all the cases described in the first to third embodiments. That is, when the base station (A) 3 serving as the master station cannot communicate with at least one of the base stations (B, C, D) 3 serving the slave station, the master station (A) 3 can communicate with the incommunicable slave station through the relay communication operation by the slave stations (B,C,D) 3. In this case, each slave station (B,C,D) may perform the relay communication operation on the basis of an instruction from the base station control-station 2. In this embodiment, the base stations 3 are assumed to be provided with inherent numbers of No. 1 to No.4, respectively.
  • the base station (A:No.1) 3 can communicate with only the base station (C:No.3) 3 and the base station (C:No.3) 3 can communicate with the base station (B: No. 2) 3.
  • the base station (C:No. 3) 3 can perform the relay communication with the base station (B:No.2) 3 with setting the base station (A:No.1) as the master station. If the base station (A:No.1) 3 is beforehand known as the master station, the above operation is unnecessary.
  • the base station (B: No. 2) 3 can communicate with both the base station (C:No.3) 3 and the base station (D:No.4) 3, the base station (B:No.2) 3 can perform the relay communication with the base station (D:No.4) with setting as a master station the base station (C:No.3) whose inherent number is smaller than the inherent number of the base station (D: No.4).
  • the base station (A:No.1) 3 can communicate with only the base station (C:No.3) 3 and the base station (C:No.3) 3 can communicate with both the base station (B:No.2) 3 and the base station (D:No.4) 3, the base station (C:No.3) 3 performs the relay communication operation in the same way as described above.
  • the relay communication operation of the base station (C:No. 3) 3 may be carried out on the basis of an instruction from the base station control-station 2.
  • the assign channel distributing system and method of the present invention on the basis of the information indicating the master/slave assignment from the base station control-station, the information on the channel interference levels, the desired channel numbers, and the like is exchanged between the master station and each slave station, and then the master station assigns the radio channels based on the information thus exchanged to the respective slave stations, thereby performing the optimum assignment of the radio channels in the radio system.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Claims (13)

  1. Zuweisungskanal-Verteilungssystem mit Teilnehmeranschlüssen (4) und einer Anzahl von Basisstationen (3) zum Kommunizieren mit den Teilnehmeranschlüssen (4), dadurch gekennzeichnet, dass das Zuweisungskanal-Verteilungssystem eine Basisstation-Steuerstation (2) aufweist zum Senden, an eine Anzahl von Basisstationen (3), von Informationen, die anzeigen, ob jede der Basisstationen (3) als eine Masterstation oder als eine Slavestation dienen soll, und dass die Anzahl von Basisstationen (3) eine oder mehrere Basisstationen aufweist, die als die Slavestationen dienen, und eine Basisstation, die als die Masterstation dient, zum Senden einer Kanalinformationsanfrage <CH> an die eine oder mehrere Basisstationen, die als CH-Information eine Information erhält, die von der einen oder mehreren Basisstationen erhalten wird, und dann an die eine oder die mehreren Basisstationen eine CH-Zuweisungsinformation sendet zum Bestimmen einer Anordnung von Funkkanälen, die die Umgebung nicht beeinträchtigen.
  2. Zuweisungskanal-Verteilungssystem nach Anspruch 1, wobei die von der Basisstation-Steuerstation (2) an die Basisstation (3) gesandte Information inhärente Zahlen enthält, die die Master/Slave-Zuweisung an die Basisstationen (3) enthält.
  3. Zuweisungskanal-Verteilungssystem nach Anspruch 1, wobei die CH-Informationsanfrage ein Signal ist zum Anfordern von Information, die einen Kanalinterferenzpegel und eine gewünschte Kanalnummer enthält, die in jeder Basisstation, die als Slavestation dient, gehalten werden.
  4. Zuweisungskanal-Verteilungssystem nach Anspruch 1, wobei jede Basisstation, die als Slavestation dient, ausgebildet ist, eine zu verwendende Funkfrequenz an den Teilnehmeranschluss (4) auf Grundlage der CH-Zuweisungsinformation zuzuweisen.
  5. Zuweisungskanal-Verteilungssystem nach Anspruch 2, wobei jede Basisstation, die als Slavestation dient, ausgebildet ist, die Basisstation, die als Masterstation dient, auf Grundlage ihrer inhärenten Zahl zu identifizieren.
  6. Zuweisungskanal-Verteilungssystem nach Anspruch 1, wobei, falls es nicht möglich ist, eine Kommunikation zwischen der Basisstation, die als Masterstation dient, und zumindest einer der Basisstationen, die als Slavestationen dienen, zu errichten, die Masterstation ausgebildet ist, um mit der nicht erreichbaren Slavestation zu kommunizieren über Weiterschaltung durch die Basisstation, die als Slavestation dient, mit der die Masterstation kommunizieren kann.
  7. Zuweisungskanal-Verteilungssystem nach Anspruch 6, wobei die Weiterschaltungskommunikation auf Grundlage eines Befehls von der Basisstation-Steuerstation (2) durchgeführt wird.
  8. Zuweisungskanal-Verteilungsverfahren mit einem Schritt der Durchführung von Kommunikation zwischen einem Teilnehmeranschluss (4) und einer Anzahl von Basisstationen (5), dadurch gekennzeichnet, dass das Verfahren aufweist:
    Einen ersten Schritt des Sendens an die Anzahl von Basisstationen (3) einer Information, die anzeigt, ob jede Basisstation als Masterstation oder als Slavestation dient, und
    einen zweiten Schritt des Sendens einer CH-Informationsanforderung von der Basisstation, die als die Masterstation dient, an eine oder mehrere Basisstationen, die als die Slavestationen dienen, des Sendens von Information, die in der Slavestation gehalten wird, an die Masterstation und dann des Sendens von der Masterstation an die Slavestationen CH-Zuweisungsinformation zum Bestimmen einer Funkkanalzuweisung, die die Umgebung nicht beeinträchtigt.
  9. Zuweisungskanal-Verteilungsverfahren nach Anspruch 8, wobei der erste Schritt einen Schritt des Sendens von inhärenten Zahlen enthält, die die Master/Slave-Zuordnung den Basisstationen (3) anzeigt.
  10. Zuweisungskanal-Verteilungsverfahren nach Anspruch 8, wobei der zweite Schritt einen Schritt aufweist zur Anfrage von Information, die einen Kanalinterferenzpegel und eine gewünschte Kanalnummer enthält, die in den Basisstationen, die als Slavestationen dienen, gehalten werden.
  11. Zuweisungskanal-Verteilungsverfahren nach Anspruch 8, wobei der zweite Schritt einen Schritt aufweist zum Zuweisen einer zu verwendenden Funkfrequenz an den Teilnehmeranschluss (4) auf Grundlage der CH-Zuweisungsinformation.
  12. Zuweisungskanal-Verteilungsverfahren nach Anspruch 9, wobei der zweite Schritt einen Schritt aufweist zum Identifizieren der Basisstation, die als Masterstation dient, auf Grundlage der inhärenten Zahl.
  13. Zuweisungskanal-Verteilungsverfahren nach Anspruch 8, mit ferner einem dritten Schritt, bei dem, wenn die als Masterstation dienende Basisstation mit nicht zumindest einigen der Basisstationen, die als Slavestationen dienen, kommunizieren kann, die Masterstation mit der nicht erreichbaren Slavestation unter Weiterschaltung der Basisstation kommuniziert, die als Slavestation dient und die mit der Masterstation kommunizieren kann.
EP99124396A 1998-12-07 1999-12-07 Kanalzuweisungssystem Expired - Lifetime EP1009182B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP34730398 1998-12-07
JP10347303A JP3067747B2 (ja) 1998-12-07 1998-12-07 無線チャネル割当システム及びアサインチャネル配送方法

Publications (3)

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EP1009182A2 EP1009182A2 (de) 2000-06-14
EP1009182A3 EP1009182A3 (de) 2000-08-23
EP1009182B1 true EP1009182B1 (de) 2005-09-28

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EP99124396A Expired - Lifetime EP1009182B1 (de) 1998-12-07 1999-12-07 Kanalzuweisungssystem

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US (1) US6487392B1 (de)
EP (1) EP1009182B1 (de)
JP (1) JP3067747B2 (de)
AU (1) AU770691B2 (de)
DE (1) DE69927465T2 (de)

Families Citing this family (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100288840B1 (ko) * 1999-03-04 2001-04-16 박종섭 무선가입자망 시스템에서 가입자 정합장치 및 다중/단일 모드 제어방법
JP3594862B2 (ja) * 1999-12-28 2004-12-02 株式会社エヌ・ティ・ティ・ドコモ 無線基地局システム、統括局及び該統括局における信号処理方法
US6650623B1 (en) 1999-12-30 2003-11-18 Aperto Networks, Inc. Adaptive link layer for point to multipoint communication system
JP3153213B1 (ja) * 2000-04-24 2001-04-03 株式会社鷹山 電話回線の制御委譲システム
US7092363B1 (en) 2000-06-26 2006-08-15 Aperto Networks, Inc. High-capacity scalable integrated wireless backhaul for broadband access networks
CN1180651C (zh) 2000-09-29 2004-12-15 西门子公司 通信系统以及与之相关的改善其业务质量的方法
US20030012173A1 (en) * 2000-11-08 2003-01-16 Johan Rune Coordinated inquiry and page procedures in an ad-hoc wireless network
FI20002860A (fi) * 2000-12-27 2002-06-28 Nokia Corp Laiteroolit ja pikoverkkoyhteydet
US6912204B2 (en) * 2001-01-19 2005-06-28 Nokia Networks Oy Apparatus and associated method, for dynamically selecting frequency levels upon which to define communication channels
US7027418B2 (en) 2001-01-25 2006-04-11 Bandspeed, Inc. Approach for selecting communications channels based on performance
JPWO2002100082A1 (ja) * 2001-05-30 2004-09-24 株式会社鷹山 通信システム
JP3896848B2 (ja) * 2001-12-27 2007-03-22 日本電気株式会社 Ｃｄｍａ方式セルラシステム
US7194271B2 (en) * 2004-04-12 2007-03-20 Lucent Technologies Inc. Allocation of channels to wireless LANs
EP1758414A4 (de) * 2004-06-18 2009-08-12 Mitsubishi Electric Corp Autonom-zellenbildungsverfahren
US7826422B2 (en) * 2006-04-25 2010-11-02 Stmicroelectronics, Inc. Synchronized, semi-dynamic frequency hopping method for WRAN and other wireless networks
US8023956B2 (en) 2006-04-28 2011-09-20 Stmicroelectronics, Inc. Scheduling methods for connection-based, over-the-air, inter-system communications for wireless networks
US8023575B2 (en) * 2006-06-13 2011-09-20 Bandspeed, Inc. Approach for spectrum analysis in a receiver
JP5201880B2 (ja) * 2006-09-08 2013-06-05 株式会社日立製作所 無線制御方法及び無線制御システム
US8195097B2 (en) * 2006-09-08 2012-06-05 Qualcomm Incorporated Serving sector interference broadcast and corresponding RL traffic power control
EP2109986A2 (de) * 2007-02-05 2009-10-21 Bandspeed, Inc. Ansatz zur abschwächung der auswirkungen von drahtlosen einzelzugangspunkten
US8849213B2 (en) 2009-01-21 2014-09-30 Bandspeed, Inc. Integrated circuit for signal analysis
US8447252B2 (en) * 2009-01-21 2013-05-21 Bandspeed, Inc. Adaptive channel scanning for detection and classification of RF signals
US8023899B2 (en) 2009-04-30 2011-09-20 Bandspeed, Inc. Approach for selecting communications channels in communication systems to avoid interference
US11128371B2 (en) * 2019-05-07 2021-09-21 Dsp Group Ltd. Digital enhanced cordless telecommunications system and method

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4549293A (en) * 1983-12-29 1985-10-22 The United States Of America As Represented By The Secretary Of The Army Time division multiple access communications system
JPH0681113B2 (ja) * 1987-09-21 1994-10-12 日本電気株式会社 時分割多重無線通信システム
JPH05206933A (ja) 1992-01-27 1993-08-13 Fujitsu Ltd 無線チャネル割り当て方式
JP3052030B2 (ja) 1993-03-17 2000-06-12 京セラ株式会社 電話網にリンクした基地局間の相互同期方式
US5448570A (en) * 1993-03-17 1995-09-05 Kyocera Corporation System for mutual synchronization and monitoring between base stations
US5394433A (en) 1993-04-22 1995-02-28 International Business Machines Corporation Frequency hopping pattern assignment and control in multiple autonomous collocated radio networks
US5946317A (en) * 1993-06-30 1999-08-31 Harris Corporation Multi-master supervisory system
JPH0744723A (ja) 1993-07-28 1995-02-14 Mitsubishi Electric Corp 図面作成装置
JP3058793B2 (ja) * 1994-03-18 2000-07-04 株式会社日立製作所 無線通信方式
JPH089455A (ja) * 1994-06-22 1996-01-12 Hitachi Ltd 無線通信システムおよび通信装置
JP2669361B2 (ja) 1994-10-14 1997-10-27 日本電気株式会社 移動通信システムにおけるチャネル設定方法
EP0709983B1 (de) * 1994-10-26 2001-06-06 International Business Machines Corporation Zuordnungsverfahren und Vorrichtung zur Wiederverwendung von Netzressourcen in einem drahtlosen Kommunikationssystem
JP3223055B2 (ja) 1994-11-11 2001-10-29 株式会社日立製作所 無線ｌａｎシステム及びその基地局装置
JP3047767B2 (ja) * 1995-03-20 2000-06-05 株式会社日立製作所 無線ｌａｎシステム
JP3197471B2 (ja) 1995-09-28 2001-08-13 京セラ株式会社 移動体通信システムにおける基地局の呼接続制御方式
JP3343848B2 (ja) 1996-11-07 2002-11-11 株式会社エヌ・ティ・ティ・ドコモ 移動無線通信システムのチャネル割り当て方法
US6073016A (en) * 1997-01-02 2000-06-06 Telxon Corporation Mobile device ID allocation system and method
FI104939B (fi) * 1997-04-23 2000-04-28 Nokia Networks Oy Merkinannon toteutus tietoliikenneverkossa

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JP2000175242A (ja) 2000-06-23
AU6306299A (en) 2000-06-08
AU770691B2 (en) 2004-02-26
EP1009182A2 (de) 2000-06-14
DE69927465T2 (de) 2006-06-22
EP1009182A3 (de) 2000-08-23
DE69927465D1 (de) 2005-11-03
US6487392B1 (en) 2002-11-26
JP3067747B2 (ja) 2000-07-24

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